Table 2.
Comparisons Between Preoperative and Postoperative Anterior Segment Biometric Parameters Related to Laser Peripheral Iridotomy in Primary Angle Closure Suspects
| Parameter | Preoperative Measurements a | Postoperative Measurements a | Outcome Difference (%) | P Valueb |
|---|---|---|---|---|
| PD (mm) | 4.00 ± 0.88 (3.75, 4.24) | 3.90 ± 0.99 (3.61, 4.07) | 0.10 (2.50% decrease) | 0.413 |
| ICURV (mm) | 0.33 ± 0.10 (0.306, 0.360) | 0.15 ± 0.10 (0.124, 0.179) | 0.18 (54.4% decrease) | <0.0001 |
| TISA500 (mm2) | 0.057 ± 0.031 (0.049, 0.066) | 0.086 ± 0.035 (0.076, 0.096) | 0.029 (50.9% increase) | <0.0001 |
| TISA750 (mm2) | 0.106 ± 0.046 (0.094, 0.120) | 0.159 ± 0.055 (0.144, 0.175) | 0.053 (49.4% increase) | <0.0001 |
a
Data are expressed as mean value ± standard deviation (95% confidence interval).
b
P values by paired Student’s t-tests.
PD = pupil diameter, ICURV = iris curvature, TISA500 = trabecular–iris space area at 500 μm from the scleral spur, TISA750 = trabecular–iris space area at 750 μm from the scleral spur.